Definition of molecule in English:

molecule

Line breaks: mol|ecule
Pronunciation: /ˈmɒlɪkjuːl
 
/

noun

Chemistry
  • A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
    More example sentences
    • It works by affecting a molecule called nitric oxide, which expands blood vessels.
    • In the water molecule there are three atoms: two of hydrogen and one of oxygen.
    • The reactant ions have enough energy to ionise the molecules of interest but not enough to break them up.

Origin

late 18th century: from French molécule, from modern Latin molecula, diminutive of Latin moles 'mass'.

More definitions of molecule

Definition of molecule in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day kerf
Pronunciation: kərf
noun
a slit made by cutting with a saw